From cd9ecc1746a3552dc1c53f8904bc1c332f807137 Mon Sep 17 00:00:00 2001
From: apio <blobs.trading@gmail.com>
Date: Thu, 20 Oct 2022 08:20:56 +0200
Subject: [PATCH] Kernel: Return EFAULT when the kernel believes the wstatus
 pointer is invalid

---
 kernel/src/thread/Scheduler.cpp | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/kernel/src/thread/Scheduler.cpp b/kernel/src/thread/Scheduler.cpp
index 27498097..5433353e 100644
--- a/kernel/src/thread/Scheduler.cpp
+++ b/kernel/src/thread/Scheduler.cpp
@@ -490,7 +490,13 @@ void sys_waitpid(Context* context, long pid, int* wstatus,
             *kwstatus = (int)(child->exit_status & 0xff);
             release_user_ref(kwstatus);
         }
-        else { kinfoln("wstatus ptr is invalid: %p", (void*)wstatus); }
+        else
+        {
+            kinfoln("wstatus ptr is invalid: %p", (void*)wstatus);
+            child->state = child->Exited;
+            context->rax = -EFAULT;
+            return;
+        }
     }
     child->state = child->Exited;
     context->rax = (long)child->id;